Disable Gitk tree-like view for now.

This is not complete and perhaps should not have been committed. However,
.xib files being what they are, rewriting history or merging is getting
very difficult so I'll just disable it for now.

If anyone wants to take a look at this: we should probably do some rev-parsing
to create a graph representation in ApplicationController. That class already
is a delegate for our table and can tell individual cells what to display.

There we should tell how many lines to draw, what color, if there are merges
or splitoffs etc.

PBGitRevisionCell.m

@@ -14,6 +14,10 @@
 
 - (void) drawWithFrame: (NSRect) rect inView:(NSView *)view
 {
+	
+	// Don't do all this drawing for now.
+	[super drawWithFrame:rect inView:view];
+	return;
 	float pathWidth = 20;
 
 	NSRect ownRect;